CN112643289A - Production and manufacturing process of lightweight new energy automobile frame - Google Patents
Production and manufacturing process of lightweight new energy automobile frame Download PDFInfo
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- CN112643289A CN112643289A CN202011203751.5A CN202011203751A CN112643289A CN 112643289 A CN112643289 A CN 112643289A CN 202011203751 A CN202011203751 A CN 202011203751A CN 112643289 A CN112643289 A CN 112643289A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
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Abstract
The invention relates to a production and manufacturing process of a lightweight new energy automobile frame, which comprises the following steps: cleaning an oxidation film on the surface of the aluminum alloy section by using acetone or ethanol to remove oil stains on the surface of the aluminum alloy section, and then treating the aluminum alloy section for 5-6 hours at low temperature; soaking the aluminum alloy section subjected to low-temperature treatment in a hydrochloric acid solution, treating at 110 ℃ for 60min, and then washing; before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, and transferring the aluminum alloy section into water with the temperature of 10-30 ℃ for cooling; after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, performing hot stamping forming on the stamping die, and performing quenching and pressure maintaining in the stamping die; performing cold post-trimming treatment on the stamped aluminum alloy section, and performing welding processing after trimming to obtain a finished product; the invention greatly improves the qualification rate of the aluminum alloy section bar punch forming.
Description
Technical Field
The invention relates to the technical field of automobile part production processes, in particular to a production process of a lightweight new energy automobile frame.
Background
With the rapid development of the automobile industry, the problems of environmental pollution and resource shortage are increasingly prominent, resource saving and pollution reduction become two major problems to be solved urgently in the automobile industry, the tasks of reducing the automobile quality, reducing the fuel consumption and reducing the emission pollution are particularly urgent in view of sustainable development, the automobile lightweight technology is one of important ways for solving the problems, and the oil consumption can be reduced by 6% -8% when the automobile quality is reduced by 10%. Therefore, the light weight becomes the development trend of automobile production and manufacture, and the application of the aluminum alloy material is an important way for realizing the light weight of the automobile. The aluminum alloy tailor-welding forming technology is to weld several aluminum alloy plates with the same or different materials, thicknesses, coatings and the like into a whole and then perform stamping production, and is considered as an effective production mode for light weight of automobiles due to the advantages of reducing the number of automobile body parts, saving materials, reducing equipment and working procedures, realizing production of ultra-wide plates and the like.
Because the formability of the aluminum alloy is poor at normal temperature, the aluminum alloy is easy to break during forming, and the resilience is severe, so that the dimensional accuracy is affected, during stamping, in order to improve the formability, avoid the breakage and reduce the resilience, the aluminum alloy plate needs to be heated and then stamped. At present, when an aluminum alloy tailor-welded blank for domestic automobiles is formed, generally, an annealed aluminum alloy plate is firstly adopted for friction stir welding, the plate is kept at a solid solution temperature for solid solution treatment after welding is completed, then the plate is quickly transferred for stamping, quenching and trimming after cooling, and then the obtained stamping part is subjected to artificial aging or natural aging treatment. It can be seen that the existing aluminum alloy tailor-welding forming process flow is complex, the plate needs to be heated for a plurality of times and a long time, the energy consumption is increased, and the production efficiency is reduced. Although the aluminum alloy is light in weight, during the stamping process, the metal material generates plastic shearing deformation, strong friction is generated between a generated shearing surface and a working surface of a die, so that local high temperature causes welding and adhesive abrasion, friction needs to be reduced, and the aluminum alloy has poor stamping resistance and is easy to break.
In view of the above drawbacks, the designer actively makes research and innovation to create a manufacturing process of a lightweight new energy automobile frame, so that the lightweight new energy automobile frame has industrial utilization value.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a production process of a lightweight new energy automobile frame, which has the advantages that the cooling speed of a welding seam is higher than that of a base metal after stamping is finished, the integral strength of a stamping part is more uniform, and the use requirement is met.
The invention relates to a production and manufacturing process of a lightweight new energy automobile frame, which comprises the following specific steps:
firstly, cleaning an oxidation film on the surface of an aluminum alloy section by using acetone or ethanol to remove oil stains on the surface of the aluminum alloy section, and then treating the aluminum alloy section for 5-6 hours at a low temperature;
soaking the aluminum alloy section subjected to low-temperature treatment in a hydrochloric acid solution, treating at 110 ℃ for 60min, and washing;
step three, before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, and then transferring the aluminum alloy section into water with the temperature of 10-30 ℃ for cooling;
step four, after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, performing hot stamping forming on the stamping die, and quenching and pressure maintaining in the stamping die;
and step five, performing cold post-trimming treatment on the stamped aluminum alloy section, and performing welding processing treatment after trimming to obtain a finished product.
Further, the temperature of the aluminum alloy section is controlled to be-25 ℃ to-20 ℃ under the low-temperature treatment in the step one, and the nitrogen content is 50% -55%.
Further, the concentration of the hydrochloric acid solution in the second step is 0.5mol/L-0.8 mol/L.
Further, the aluminum alloy section in the third step is placed into a quenching furnace, the temperature is increased to 300 ℃ at the temperature increasing speed of 0-5 ℃/min, and the temperature is kept for 15 min.
Furthermore, in the hot stamping and quenching integrated forming process in the fourth step, the stamping speed is more than 450mm/s, the pressure maintaining time is 10-20 s, and the unit pressure is 1.5-1.8 Mpa.
Furthermore, in the hot stamping and quenching integrated forming process of the fourth step, the deformation temperature of stamping is controlled to be 250 ℃, and the blank holder force is 3N/mm2。
Further, the punching oil in the fourth step comprises the following components in percentage by mass: 70-90 wt% of white oil, 5-20 wt% of dearomatization solvent, 1-10 wt% of synthetic ester and 1-10 wt% of sulfurized fatty acid ester.
Further, in the fifth step, the welding treatment is performed on the part with the finished edge cutting, the welding speed is 18-22mm/s, the welding current is 235-255A, and the voltage is 24.0V.
By the scheme, the invention at least has the following advantages:
1. compared with the situation that the welding seam is easy to generate AGG after multiple and long-time heating caused by adopting solid solution and aging treatment in the traditional process, the welded plate needs to be heated before stamping in order to improve the formability and reduce the deformation resistance and resilience because the formability of the aluminum alloy is poor at low temperature, and the tailor-welded plate has good elongation and is not easy to generate AGG by controlling the heat preservation temperature and time;
2. the long-time solid solution heat preservation treatment of the traditional hot stamping is not needed during the forming, and the time-consuming age hardening treatment is not needed after the forming, so that the traditional hot stamping process can be greatly simplified, the production efficiency is improved, the cost is reduced, and the generation of AGG is avoided;
3. because the cooling speed of the welding seam is higher than that of the parent metal after the stamping is finished, the overall strength of the stamping part can be more uniform, and the use requirement can be met.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic flow chart of an embodiment of a production process of a lightweight new energy automobile frame according to the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example one
The production and manufacturing process of the lightweight new energy automobile frame comprises the following specific steps:
firstly, cleaning an oxidation film on the surface of an aluminum alloy section by using acetone or ethanol to remove oil stains on the surface, and then treating the aluminum alloy section at a low temperature for 5-6h, wherein the temperature of the aluminum alloy section under the low-temperature treatment is controlled to be-25-20 ℃, and the nitrogen content is 50-55%;
soaking the aluminum alloy section subjected to low-temperature treatment in a hydrochloric acid solution, treating at 110 ℃ for 60min, and washing;
step three, before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, and then transferring the aluminum alloy section into water with the temperature of 10-30 ℃ for cooling;
step four, after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, performing hot stamping forming on the stamping die, and quenching and pressure maintaining in the stamping die;
and step five, performing cold post-trimming treatment on the stamped aluminum alloy section, and performing welding processing treatment after trimming to obtain a finished product.
Example two
The production and manufacturing process of the lightweight new energy automobile frame comprises the following specific steps:
firstly, cleaning an oxidation film on the surface of an aluminum alloy section by using acetone or ethanol to remove oil stains on the surface of the aluminum alloy section, and then treating the aluminum alloy section for 5-6 hours at a low temperature;
step two, soaking the aluminum alloy section subjected to low-temperature treatment in hydrochloric acid solution with the concentration of 0.5-0.8 mol/L, treating at 110 ℃ for 60min, and washing;
step three, before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, and then transferring the aluminum alloy section into water with the temperature of 10-30 ℃ for cooling;
step four, after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, performing hot stamping forming on the stamping die, and quenching and pressure maintaining in the stamping die;
and step five, performing cold post-trimming treatment on the stamped aluminum alloy section, and performing welding processing treatment after trimming to obtain a finished product.
EXAMPLE III
The production and manufacturing process of the lightweight new energy automobile frame comprises the following specific steps:
firstly, cleaning an oxidation film on the surface of an aluminum alloy section by using acetone or ethanol to remove oil stains on the surface, and then treating the aluminum alloy section at a low temperature for 5-6h, wherein the temperature of the aluminum alloy section under the low-temperature treatment is controlled to be-25-20 ℃, and the nitrogen content is 50-55%;
soaking the aluminum alloy section subjected to low-temperature treatment in a hydrochloric acid solution, treating at 110 ℃ for 60min, and washing;
step three, before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, putting the aluminum alloy section into the quenching furnace, raising the temperature to 300 ℃ at the temperature rise speed of 0-5 ℃/min, preserving the temperature for 15min, and transferring the aluminum alloy section into water of 10-30 ℃ for cooling;
step four, after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, performing hot stamping forming on the stamping die, and quenching and pressure maintaining in the stamping die;
and step five, performing cold post-trimming treatment on the stamped aluminum alloy section, and performing welding processing treatment after trimming to obtain a finished product.
Example four
The production and manufacturing process of the lightweight new energy automobile frame comprises the following specific steps:
firstly, cleaning an oxidation film on the surface of an aluminum alloy section by using acetone or ethanol to remove oil stains on the surface, and then treating the aluminum alloy section at a low temperature for 5-6h, wherein the temperature of the aluminum alloy section under the low-temperature treatment is controlled to be-25-20 ℃, and the nitrogen content is 50-55%;
soaking the aluminum alloy section subjected to low-temperature treatment in a hydrochloric acid solution, treating at 110 ℃ for 60min, and washing;
step three, before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, and then transferring the aluminum alloy section into water with the temperature of 10-30 ℃ for cooling;
step four, after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, performing hot stamping forming on the stamping die, and performing quenching and pressure maintaining in the stamping die, wherein in the hot stamping and quenching integrated forming process, the stamping speed is greater than 450mm/s, the pressure maintaining time is 10-20 s, and the unit pressure is 1.5-1.8 Mpa;
and step five, performing cold post-trimming treatment on the stamped aluminum alloy section, and performing welding processing treatment after trimming to obtain a finished product.
EXAMPLE five
The production and manufacturing process of the lightweight new energy automobile frame comprises the following specific steps:
firstly, cleaning an oxidation film on the surface of an aluminum alloy section by using acetone or ethanol to remove oil stains on the surface, and then treating the aluminum alloy section at a low temperature for 5-6h, wherein the temperature of the aluminum alloy section under the low-temperature treatment is controlled to be-25-20 ℃, and the nitrogen content is 50-55%;
soaking the aluminum alloy section subjected to low-temperature treatment in a hydrochloric acid solution, treating at 110 ℃ for 60min, and washing;
step three, before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, and then transferring the aluminum alloy section into water with the temperature of 10-30 ℃ for cooling;
step four, after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, performing hot stamping forming on the stamping die, quenching and pressure maintaining in the stamping die, and controlling the deformation temperature of stamping and the blank holder force to be 3N/mm in the hot stamping and quenching integrated forming process2；
And step five, performing cold post-trimming treatment on the stamped aluminum alloy section, and performing welding processing treatment after trimming to obtain a finished product.
EXAMPLE six
The production and manufacturing process of the lightweight new energy automobile frame comprises the following specific steps:
firstly, cleaning an oxidation film on the surface of an aluminum alloy section by using acetone or ethanol to remove oil stains on the surface, and then treating the aluminum alloy section at a low temperature for 5-6h, wherein the temperature of the aluminum alloy section under the low-temperature treatment is controlled to be-25-20 ℃, and the nitrogen content is 50-55%;
soaking the aluminum alloy section subjected to low-temperature treatment in a hydrochloric acid solution, treating at 110 ℃ for 60min, and washing;
step three, before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, and then transferring the aluminum alloy section into water with the temperature of 10-30 ℃ for cooling;
step four, after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, carrying out hot stamping forming on the stamping die, and carrying out quenching and pressure maintaining in the stamping die, wherein the stamping oil comprises the following components in percentage by mass: 70-90 wt% of white oil, 5-20 wt% of dearomatization solvent, 1-10 wt% of synthetic ester and 1-10 wt% of sulfurized fatty acid ester;
and step five, performing cold post-trimming treatment on the stamped aluminum alloy section, and performing welding processing treatment after trimming to obtain a finished product.
EXAMPLE seven
The production and manufacturing process of the lightweight new energy automobile frame comprises the following specific steps:
firstly, cleaning an oxidation film on the surface of an aluminum alloy section by using acetone or ethanol to remove oil stains on the surface, and then treating the aluminum alloy section at a low temperature for 5-6h, wherein the temperature of the aluminum alloy section under the low-temperature treatment is controlled to be-25-20 ℃, and the nitrogen content is 50-55%;
soaking the aluminum alloy section subjected to low-temperature treatment in a hydrochloric acid solution, treating at 110 ℃ for 60min, and washing;
step three, before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, and then transferring the aluminum alloy section into water with the temperature of 10-30 ℃ for cooling;
step four, after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, performing hot stamping forming on the stamping die, and quenching and pressure maintaining in the stamping die;
and step five, performing cold post-trimming treatment on the punched aluminum alloy section, and performing welding treatment on the trimmed part, wherein the welding speed is 18-22mm/s, the welding current is 235-255A, and the voltage is 24.0V, so as to obtain a finished product.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first," "second," "a" and "two" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, features defined as "first," "second," "a" and "two" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A production and manufacturing process of a lightweight new energy automobile frame is characterized by comprising the following specific steps:
firstly, cleaning an oxidation film on the surface of an aluminum alloy section by using acetone or ethanol to remove oil stains on the surface of the aluminum alloy section, and then treating the aluminum alloy section for 5-6 hours at a low temperature;
soaking the aluminum alloy section subjected to low-temperature treatment in a hydrochloric acid solution, treating at 110 ℃ for 60min, and washing;
step three, before punch forming, putting the aluminum alloy section into a quenching furnace for a period of time, and then transferring the aluminum alloy section into water with the temperature of 10-30 ℃ for cooling;
step four, after drying the cooled aluminum alloy section, uniformly coating stamping oil on the surfaces of a stamping die and the aluminum alloy section, performing hot stamping forming on the stamping die, and quenching and pressure maintaining in the stamping die;
and step five, performing cold post-trimming treatment on the stamped aluminum alloy section, and performing welding processing treatment after trimming to obtain a finished product.
2. The production process of the lightweight new energy automobile frame according to claim 1, wherein in the first step, the temperature of the aluminum alloy section is controlled to be-25 ℃ to-20 ℃ under low-temperature treatment, and the nitrogen content is 50% -55%.
3. The production process of the lightweight new energy automobile frame according to claim 1, wherein the concentration of the hydrochloric acid solution in the second step is 0.5mol/L-0.8 mol/L.
4. The production and manufacturing process of the light-weight new energy automobile frame according to claim 1, characterized in that the aluminum alloy section in the third step is placed into a quenching furnace, the temperature is increased to 300 ℃ at a temperature increasing speed of 0 ℃/min-5 ℃/min, and the temperature is kept for 15 min.
5. The production process of the lightweight new energy automobile frame according to claim 1, wherein in the hot stamping and quenching integrated forming process in the fourth step, the stamping speed is greater than 450mm/s, the pressure maintaining time is 10-20 s, and the unit pressure is 1.5-1.8 MPa.
6. The production and manufacturing process of the lightweight new energy automobile frame according to claim 4, wherein the deformation temperature of stamping in the hot stamping and quenching integrated forming process of the fourth step is controlled to be 250 ℃, and the blank holder force is 3N/mm2。
7. The production and manufacturing process of the light-weight new energy automobile frame according to claim 1, wherein the stamping oil in the fourth step comprises the following components in percentage by mass: 70-90 wt% of white oil, 5-20 wt% of dearomatization solvent, 1-10 wt% of synthetic ester and 1-10 wt% of sulfurized fatty acid ester.
8. The production process of the light-weight new energy automobile frame as claimed in claim 1, wherein in the step five, the part with the cut edge completed is subjected to welding treatment, the welding speed is 18-22mm/s, the welding current is 235-255A, and the voltage is 24.0V.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115106724A (en) * | 2022-06-07 | 2022-09-27 | 扬州市银源汽车配件有限公司 | Integral forming processing method for special-shaped section bar of cabin door framework |
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2021
- 2021-02-05 CN CN202011203751.5A patent/CN112643289A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115106724A (en) * | 2022-06-07 | 2022-09-27 | 扬州市银源汽车配件有限公司 | Integral forming processing method for special-shaped section bar of cabin door framework |
| CN115106724B (en) * | 2022-06-07 | 2024-02-27 | 扬州市银源汽车配件有限公司 | Integral molding processing method for cabin door framework profiled bar |
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